238123820 has 24 divisors (see below), whose sum is σ = 545520528. Its totient is φ = 86590400.

The previous prime is 238123817. The next prime is 238123867. The reversal of 238123820 is 28321832.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540971 + ... + 541410.

It is an arithmetic number, because the mean of its divisors is an integer number (22730022).

Almost surely, 2^238123820 is an apocalyptic number.

238123820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238123820 is an abundant number, since it is smaller than the sum of its proper divisors (307396708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

238123820 is a wasteful number, since it uses less digits than its factorization.

238123820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082401 (or 1082399 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 238123820 is about 15431.2611279830. The cubic root of 238123820 is about 619.8228942629.

The spelling of 238123820 in words is "two hundred thirty-eight million, one hundred twenty-three thousand, eight hundred twenty".